What Wiring do I Need to Install to get My 2021 Ford Ranger Ready for a Brake Controller?
Updated 09/02/2025 | Published 08/03/2025
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Question:
I have a 2021 Ford Ranger w/factoy 4-pin. I tow a camper that uses a 7-blade connector. I currently have a 4 pin - 7-blade adapter on my truck. What other products would I need to ensure this brake controller can communicate with my single axle camper via the 7-blade connector?
asked by: Max D
Expert Reply:
Hello Max,
Happy to get the right wiring for you.
Since you already have the 4 flat on the back, in order for you to use the Redarc Tow-Pro Liberty Brake Controller w/ Universal Wiring Harness - Dash Knob - Proportional # RED52VR you will need to install the Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires # ETBC7.
You will need to run a power line from your battery to the rear with a couple of amps along the way, and a brake wire from the front driver side to the 7 way on the rear of the vehicle as well. I attached an install video so you can see exactly what needs to be done.
Got your first big camping adventure planned for after you get things set-up? Where are you headed?
(click to enlarge)
Product Page this Question was Asked From
Redarc Tow-Pro Liberty Brake Controller w/ Universal Wiring Harness - Dash Knob - Proportional
- Trailer Brake Controller
- Proportional Controller
- Electric
- Electric over Hydraulic
- Plug-In
- Dash-Mounted Knob
- Behind-Dash
- Up to 2 Axles
- Indicator Lights
- Single Trailer Only
- Redarc
more information >
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Kate F.
9/2/2025
Hey Max, Did you find the installation video helpful for setting up your brake controller with the 7-way connector? I'd love to hear how it went, as it could help others looking to do the same.